I run one in my 135 and I think it's pretty cool. On the "worth the money" part... I don't know. They are expensive and I think that it is less important that a good skimmer, Calcium reactor ect...
I like the look but I would spend the money on more important things first.
Also, if you don't have a 6 foot tank, don't waste your money. The device works by hitting the resonance frequency of the tank. That's how it gets a nice wave whithout using alot of power. The longer the tank, the bigger the wave.
It's nice to see coral polyps swaying back and forth on the far side of the tank but I think it should be considered a luxury, not a neccesity.
Garrick.
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